Thursday, November 4, 2010

Cloaking effect in atoms baffles scientists: "Laricchia's team fired positronium atoms at 1100 to 4400 kilometres per second into various gases, including hydrogen, krypton and water vapour. Curiously, the scattering rates for positronium were almost identical to that of a plain electron, as though the positron's influence was somehow 'cloaked'.

James Walters, a theorist at Queen's University Belfast who studies matter-antimatter interactions, says the result will be tough to explain mathematically because the scattering process is so complex."